GlusterFS常用设置命令

本文主要介绍GlusterFS常用设置命令,有关GlusterFS服务器快速安装和设置的内容,请阅读科威网的另一篇文章《在CentOS 6.x上安装GlusterFS》

  1. 可信存储池(Trusted Storage Pool)

    1. 创建存储池

    2. 例如要创建一个包含3个服务器的存储池,则需要从第一个服务器server1中把另外两个服务器加入存储池中:

      # gluster peer probe server2
      Probe successful
      
      # gluster pool peer server3
      Probe successful
      

      查看存储池状态:

      # gluster peer status
      Number of Peers: 2
      
      Hostname: server2.quenywell.com
      Uuid: 86bd7b96-1320-4cd5-b3e1-e537d06dd5f7
      State: Peer in Cluster (Connected)
      
      Hostname: server3.quenywell.com
      Uuid: c191b17b-ab9d-4b15-a70d-dcc92be067c9
      State: Peer in Cluster (Connected)
      
    3. 从存储池移除服务器

    4. 假设要把server3从存储池里删除,可以使用以下命令:

      # gluster peer detach server3
      Detach successful
  2. GlusterFS逻辑卷(Volume)

  3. 逻辑卷由一个或多个存储块(Brick)组成,每个存储块对应存储池中的一个目录。
    GlusterFS的基本类型有三个,分别是分散存储(Distributed,将不同的文件放在不同的存储块)、镜像存储(Replicated,同一个文件存放在两个以上的存储块,相当于RAID1) 和分片存储(Striped,将一个文件分划分为多个固定长度的数据,分散存放在所有存储块,相当于RAID0)。另外Distributed也可以跟Replicated和Striped组合形成新的类型。
    建立GlusterFS逻辑卷的基本语法:

    # gluster volume create  [stripe ] [replica ] [device vg] [transport ]  ...
    1. 创建Distributed逻辑卷

    2. 创建一个名字为dis-volume、包含两个存储块、使用TCP协议的Distributed逻辑卷:

      # gluster volume create dis-volume server1:/data server2:/data
      Creation of dis-volume has been successful
      Please start the volume to access data.

      查看逻辑卷状态:

      # gluster volume info
       
      Volume Name: dis-volume
      Type: Distribute
      Volume ID: 5429d6c1-44e5-43ad-a495-0a1f5b6d774b
      Status: Started
      Number of Bricks: 1 x 2 = 2
      Transport-type: tcp
      Bricks:
      Brick1: server1.quenywell.com:/data
      Brick2: server2.quenywell.com:/data
      
    3. 创建Replicated逻辑卷

    4. 创建一个名字为rep-volume,包含两个存储块,使用TCP协议的Replicated逻辑卷:

      # gluster volume create rep-volume replica 2 transport tcp server1:/data server2:/data
      Creation of rep-volume has been successful
      Please start the volume to access data.
    5. 创建Striped逻辑卷

    6. 创建一个名字为strip-volume,包含两个存储块,使用TCP协议的Striped逻辑卷:

      # gluster volume create strip-volume stripe 2 transport tcp server1:/data server2:/data
      Creation of strip-volume has been successful
      Please start the volume to access data.
    7. GlusterFS逻辑卷权限控制(可选,非必须)

    8. 可以给Gluster逻辑卷设置访问权限以增加安全性。可使用auth.allow和auth.reject允许或禁止特定IP地址访问逻辑卷,支持*通配符。例如:192.168.0.*、192.168.*、192.*都是符合规则的。
      例如允许192.168.0.*网段的主机访问rep-volume:

      # gluster volume set rep-volume auth.allow 192.168.0.* 
    9. 启动GlusterFS逻辑卷

    10. 注意:逻辑卷在使用前必须先启动!
      基本语法:

      # gluster volume start 

      例如要启动rep-volume:

      # gluster start rep-volume
      Starting rep-volume has been successful
    11. 查看GlusterFS逻辑卷状态

    12. 基本语法:

      # gluster volume info 

      例如要查看rep-volume状态:

      # gluster volume info rep-volume
       
      Volume Name: rep-volume
      Type: Replicate
      Volume ID: 5429d6c1-44e5-43ad-a495-0a1f5b6d774b
      Status: Started
      Number of Bricks: 1 x 2 = 2
      Transport-type: tcp
      Bricks:
      Brick1: server1.quenywell.com:/data
      Brick2: server2.quenywell.com:/data
      
    13. 停止GlusterFS逻辑卷

    14. # gluster volume stop rep-volume
      Stopping volume will make its data inaccessible. Do you want to continue? (y/n)

      输入y然后按回车键(Enter),将会出现如下信息:

      Stopping volume rep-volume has been successful
    15. 删除GlusterFS逻辑卷

    16. # gluster volume delete rep-volume
      Deleting volume will erase all information about the volume. Do you want to continue? (y/n)

      输入y然后按回车键(Enter),将会出现如下信息:

      Deleting volume test-volume has been successful
  4. 存储块Brick操作命令

    1. 增加Brick

    2. 在rep-volume卷中增加一个存储块server3:/data:

      # gluster volume add-brick rep-volume server3:/data
      Add Brick successful

      重要:每次操作存储块之后都必须执行一次rebalance命令!

      # gluster volume rebalance rep-volume start
      Starting rebalancing on volume rep-volume has been successful
    3. 删除Brick

    4. 在rep-volume卷中删除存储块server3:/data:

      # gluster volume remove-brick rep-volume server3:/data
      Removing brick(s) can result in data loss. Do you want to Continue? (y/n)

      输入y然后按回车键(Enter),将会出现如下信息:

      Remove Brick successful

      执行rebalance命令:

      # gluster volume rebalance rep-volume start
      Starting rebalancing on volume rep-volume has been successful

(完)


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